<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="@/assets/heima.png" alt="">
        <span>后台管理系统</span>
      </div>
      <el-button @click="logout" type="info">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="iscollapse? '64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="iscollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id" >
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
           
          <!-- 二级菜单 -->
              <el-menu-item :index="'/'+subitem.path" v-for=" subitem in item.children" :key="subitem.id" @click="saveNavState('/'+subitem.path)" >
                <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{subitem.authName}}</span>
            </template>
              </el-menu-item>
            
          </el-submenu>


          <!-- <el-menu-item index="2">
            <i class="el-icon-menu"></i>
            <span slot="title">导航二</span>
          </el-menu-item>
          <el-menu-item index="3" >
            <i class="el-icon-document"></i>
            <span slot="title">导航三</span>
          </el-menu-item>
          <el-menu-item index="4">
            <i class="el-icon-setting"></i>
            <span slot="title">导航四</span>
          </el-menu-item> -->

          
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {

  data(){
  return{
  //左侧菜单数据
  menulist:[],
  iconsObj:{
      '125':'iconfont icon-user',
      '103':'iconfont icon-tijikongjian',
      '101':'iconfont icon-shangpin',
      '102':'iconfont icon-danju',
      '145':'iconfont icon-baobiao'
  },
  //是否折叠
  iscollapse:false,
  //被激活的链接地址
  activePath:''
  }
  },
    created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
    console.log('激活created');
    },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
      this.$message({
        message: '退出成功！',
        duration: 1000
      })
    },
    //获取所以的菜单
    async getMenuList(){
      const {data:res} = await this.$http.get('menus')
      if(res.meta.status !== 200)return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res);
    },
    //点击按钮，切换菜单的折叠与展开
    toggleCollapse(){
    this.iscollapse = !this.iscollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
    window.sessionStorage.setItem('activePath',activePath)
    this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;

}

.el-header {
  background-color: #373D41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;

  div {
    display: flex;
    align-items: center;

    img {
      margin: 0 10px;
    }

    span {
      margin-left: 10px;
    }
  }
}

.el-aside {
  background-color: #333744;
  .el-menu{
  border-right: 0px;
 
  }
}

.el-main {
  background-color: #EAEDF1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
background-color: #4A5064;
font-size: 10px;
line-height: 24px;
color: #fff;
text-align: center;
letter-spacing: 0.2em;
cursor: pointer;
}
</style>